Patent US2120211A successfully refreshed from Google Patents.
US2120211A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stovepipe coupling
Assignee: —
•
Filing: —
•
Granted: 1938-06-07
•
Expires: 1955-06-07
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:06
CPC Classifications
F; F16; F16L; F16L21/00; F16L21/06; F23; F23J; F23J13/00; F23J13/04; F16L21/065; F23J2213/00; F23J2213/20; F23J2213/202; Y; Y10; Y10T; Y10T24/00; Y10T24/44; Y10T24/44239
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1941-06-06 | 1941-12-06 | 1942-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1945-06-06 | 1945-12-06 | 1946-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1949-06-06 | 1949-12-06 | 1950-06-07 | $7700.00 | Window Closed / Lapsed |